ローザンヌ 4月の天気

Regulars are consistent that the lakeside valley itself rarely sees snow this month even as the peaks above 1500-2000m stay well into winter conditions - two very different seasons close together. Our row backs both halves, a mild 14.1C day over 7.3C nights in the valley, with 113mm of rain across 13.9 days and a real 21.3cm of snow reflecting that higher-elevation total rather than town-level snowfall. Regulars describe the month as genuinely unsettled overall, a late-April day capable of swinging from rainy and cold to sunny and near 20C depending on the week. The record: humidity 75 percent, 10.6 hours of sun, a 9.1 kph wind and AQI 40.

Forum posters describe Lausanne as sharing Geneva's general winter pattern but with noticeably less fog, since the wider Swiss plateau and Geneva itself can sit under low cloud for days at a time in December. Posters note it seldom drops below freezing in low-lying lakeside spots like Lausanne, and some winters bring little or no snow at all right in the city center, even though the region's full climate record shows meaningful average December snowfall and a fairly high number of rainy days overall - Lausanne's lakeside elevation runs milder and snow-uncertain compared to nearby higher ground. Posters are enthusiastic about December as Christmas market season, with especially large ones in Basel, Bern, Zurich and nearby Montreux worth combining with a Lausanne base. Posters generally rate December as cold, often grey and snow-uncertain for Lausanne itself, workable and increasingly festive as the Christmas market season gets underway.

Forum posters put early June around 15-25C and call it beautiful without being too hot, though they're quick to flag that Swiss weather is genuinely unpredictable and varies a lot by altitude - expect a real mix of warm sun, rain, and the occasional thunderstorm within the same trip. Layered clothing plus sturdy waterproof shoes are the standard packing call. June draws noticeably fewer crowds than peak summer, though the city's jazz festival dates are worth checking in advance if avoiding a busier stretch matters to the itinerary.